Process for permanently removing wall-saltpeter and similar eruptions.



' usrrnn srarns arana ornion.

MICHAEL FROSCHMAIER, OF BAD AIBLING, GERMANY. I PROCESS FOR PERMANE NTLYREMOVING WALL-SALTPETER AND SIMILAR ERUPTIONS. A

' Patented March 12, 1907.

Application filed Felix-nary 11, mm. Serial No. 356,874.

To all whom it may concern.-

Be it known that 1, MICHAEL FRoson- MAIER, painter, a citizen ofGermany, ,residingat Bad Aibling,'Ba varia, Germany, have inventedcertain new anduseful Improve-' ments in Processes for PermanentlyRemoving Wall-Saltpeter and Similar Eruptions; and I do hereby declarethe following to be a full, clear, and exact descri tion of theinvention, such as will enable ot ers skilled in the 'art to which itappertains tomake an use heat must e continued until' small scales aboutone-half to one millimeter thick begin to come away from the wall,-accompanied-by a low crackling noise.

Experiments and trials have shown that I the heat of the blow-lampdestroys all harmful elements in the wallto a depth of from two to threecentimeters. After the burning of the wall a solution of potassiumsilicateand owdered carbonate of, lime in water sho d be applied inadvantageously two coatings in order to prevent withcertainty a returnof the evil. The object of these coatin s is to prevent the entrance ofmoisture, t e addition of carbonate'of lime being made to preventdecomposition.

The appearance of the saltpeter spots is certainly'not restored by thisprocess; but

art must first be cleansed of this may be remedied by givin the wall,advantageously one day after t e burning, a coat of whitewash or paint.This coat will cure .the unsightly appearance of'the wall, and a returnof the ugly wall-spots is prevented.

In the ease of new buildings the walls mayadvantageously be first giventhe usual ground coating of distemper, and the saltpeter s ots willthenappear within a few da s and c more easily distinguishable upon t epainted surface.

What I claim as my invention, and desire to secure by Letters Patent, is

1. The process which consists in applying heat to wall-saltpeter andsimilar eruptions until the surface scales 0H.

2. The process which consists in applying heat to wall-saltpeter andsimilar eruptions until the surface scales off and. then applyingthereto a waterproofing coating.

. 3. The process which consists in applying heat to walla-saltpeter andsimilar eruptions until the surface scales off and then applying theretoa water solution of potassium silicate and carbonate of lime.

4. The process which consists in applying heat to wall-saltpeter andsimilar eruptions until the surface scales off and then applying theretoa water solution of potassium sllicate and finally painting.

5. The recess which consists in progressively app ying heat towall-saltpeter and similar eruptions from the central portion to theouter boundary of the affected locality until the surface scales oifwith a crackling noise, then coating with a water solution of-Ipotassium silicate and carbonate of lime, and

nally painting. v

In testimony whereof I hereunto aflix my signature in the resence of twowitnesses. MIC AEL FROSOHMAIER. Witnesses: AhRAHAM SOHLESINGER,-

LoUIs'F. MUE LER.

